Magneto



Nov. 10, 1925. 1,560,839

J. L. MlLTON- MAGNETO 7 Filed Jan 12. 1921 2 Sheets-Sheet l Nov. 10,1925 1,560,839

J. L. MILTON MAGNETO Filed Jan. 12. 1921 2 Sheets-Sheet 2 amen kw IMMM 7442a,.

Patented Nov. 10, 1925.

UNITED. STATES JOHN LEWIS MILTON, OF LOUISVILLE, KENTUCKY.

Application filed January 12, 1921. Serial no. 436,740.

To all whom it may concern:

Be it known that I, JOHN LEWIS MrrrroN, a citizen of the United States of America, residing in Louisville, in the county ;of Jefferson and State of Kentucky, have invented certain new and useful Improvementi'sjin Magnetos, of which theg fo'llowing is a speci fication. reference being had'to the'a-ccoin panying drawings. a ".f.

This invention relates to improvementsin electric generators, more particularly to induction alternators especially adapted for use in connection with internal combustion engines. I have sought'to reduce the costs of production and to increase the efficiency oi the class of devices t o -wh ichf my .invention "relates. i For the purpose of disclosing my invention and its scope of application, I have selected the accompanying drawings" in \\'hich:- i V Figure 1 is a transverse cross-sectional view of an electric generatorembodying my invention. in a substantially full size scale of a machine which I have had in success.

t'nl operation for a long period of time.

Figure 2 is a transverse cross-sectional view of an electric generaton embodying a modification of the application of my invention, and shows the operating spring placed inside the generator. i I

Figure 3 is an end elevation of"Figure"1 with the face member of theop'erating lever removed. I I I Figure 4 is an end elevation of Figure 1 with a starting lever added and also shows an operating part of the engine on which'it is to be installed. Figure 5 is a view taken along line of Figure 2. i

Like figures and references denote the same arts .wherever they are shown.

In 81s drawings 46 lindijcates the rotor androtonshaft construpted a unit; 2 is a'baseaii'd p'ole piece of magnetie material which Ihave slipwnas a driit'arygoast ing; it'ean'be constructed of stampings svhere desirable.

The double actipg torsion spring-12 bodies "a unique feature of'my generator. It is shown enclosed in Figure 2 and exposedin Figure l 'and disposed on bearing 13 made ofeither magnetic ornon-ma netic material. A'lng lai is n ade a parto said bearing and"servesftoieiigage the ends 14.

i4} of spring jlt; A :liig"15?"ai rextension of operating oscillating lever'w is so correlated with the lug l i' 'that will freely-swing past same, It will. be noted that :thIspring ends 14, 14", also enga"e'l ug'15.' Th e torsion type of spring "can e'so formed that as it is put in place as shown inthe drawings, it will be strained so as to'be under pressure i. e. it will exert pressurelon the lug fixed to the generator frame and without exerting pressure on the trip finger lug until the latter is moved from rest. As it'moves from rest, it'engagesthe spring already under any desired tension. When desirable, the sprin may' be so formed as to be capable of "installing withoutbeing'placed under this initial tension, and just so its ends will register with ,either of the lugs, which may .be. of the same or varying widths, according to re'sults desired. While I have shown the torsion sprin e11 circling the shaft or a bearing and shai t, its form anddispositionare susceptible of many variations that will suggest themselvesto one skilled in the art. This is also true of the lugs; they may be dispensed with and other means provided for engaging"the spring ends; 'A"suitable device which is a part of the internal combustion engine on which'my generator is to be' placed" and which'is shown inFigure t engages with the faceljfi 'of lever 15 and moves'it in a clock- Wise direction as viewed in'Figure 4.

When lever, rotor and timer cam are released, the stressed spring 12 rapidly returns these members to rest. I It will be noted that this spring impels and then arrests the rotor andthe parts affixed to it.

Many widelyvarying embodiments of my invention-and various applications thereof, such as will suggest themselves to those skilled in theja'rt to which my invention relates, may be used and made without departing fromthe'spirit'and scope of my invention. My disclosures and the foregoing descriptions are purely illustrative and are not intended to be in any sense limiting.

What I claim is 1- 1. The combination of an electric generator provided with a stator and a rotor, and a. mechanism for oscillati'ng said rotor, in which a torsion spring constructed with free ends is supported by said stator, and the free ends engage a lug fixed on the stator; also. a lug on said oscillating mechanism so s to return said rotor to a predetermined position when moved away from same and released.

2. The combination of an electric ge-norator provided with a frame and a "rotor, and a mechanism for o'seilla'tin'g'said rotor, in which a torsion spring con'strnetedwi'th free ends is supported by said f'r a'i'ne, and -fthe free ends engagetW'o in'ernbe'rs one carried on "said "rotor and the other one carried by said frame so as to return said-rotor to a ,predetern'iined position when moved aiitbf ii-om said ,position and released.

3. Dire combination of an electrical generatorprovided with a lug-mounted on the frame thereof, a rotor and an operatinglever attached 'to same, with a torsion sprii o surrounding said rotor shaft; the ends of which engage said lug and an efitens'ion of said lever.

4. The combination of an electriegenerator-provided with-a lug mounted thereon, a rotor and an operating lever attached to same with a torsion spring surrounding said rotor shaft and engaging said lug and lever so as to return said rotor to a predetermined position when moved away from same.

5. The combination of an electrical generator, a rotor, a trip finger mounted thereon, a torsion spring surroundingthegenerator bearing and rotor shaft --a pair of lugs, one being mounted on the generator frame and the other being a :Part of said trip finger.

6. The combination of an electrical generator, a rotor, a trip finger mounted thereon, a torsion spring surrounding the generator bearing and rotor shaft and a pair or hrgs, one being mounted on the generator frame and the otherbeing a ,part of said trip-'finger,-and the ends ofsaidsprirrgbeing so correlated with theiugsastmhold them in alignment when-the rotor iset-"rest.

7. The combination of aaneleetricaal ,generator provided with -a lag mounted there on, a-aptor with a lug attaehedtthereto with atorsion spring ear-rounding said ro't'or shaft ndeagagiag rlags so tofyieldingty hol'd j said a-otor Sm a predetermined fisitienwheirati't. A

8. 111 an oseilltor #for is ree =sio'msi sprin operatiwely eemieoted gto a anagiietosshafgfstatinaryaireans ito wliolding said spring under initial tension, movable means for imparting a further torsional strain to said spring, whereby the release of said spring produces an accelerated rotation of the magneto shaft. and means wherein said spring operatesas a bufier to absorb the shock of the parts as they return to normal position.

9. In an oscillator for magnetos, a torsional spring consisting of a coiled body portion terminating "in oppositely extending ends, a member extending through the coils of saidbody portion for supporting said spring. means for operatively connecting said spring to a magneto shaft, and means for imparting a torsional strain to said spring in either direction, whereby the release of said spring produces an accelerated reverse rotation of tllemqig he t0 shaft.

10. ha 'n'i'ag'n'eto, an oscillator comprising a coiled torsional spring inoi'i'nte'd'in substantiallyaxial alinement with the magnet-o shaft and operatively connected therewith. means for holding said spring in norl'na'l position, means for imparting a torsional strain to said spring, so that the release of said spring produces an accelerated rotation of the magneto shaft, and means whereby said spring acts'to absorbthe shock of the parts as they-return to normal position.

11. In a magneto, an oscillator comprising a coiled torsional spring mounted in substantially axial alinement with the magneto shaft and operatively connected therewith. means for holding said spring in norn'ialpo stion, means for imparting a torsional strain to said spring in either direction, so that release of said spring produces an ar Cele-rated rotation of the magneto shaft, and means whereby said spring acts to absorb the Shock-of the parts as they return to nor- -n1a,l p ositionfrom either direction.

12. In a magneto, an oscillator provided. with a torsional spring consisting of a coiled body portion having a projecting end, a member extending through the coils of said body portion for supporting said spring, 'means for operatiyely connecting said spring to the magneto shaft, astop for said ;prqjeeting end of the spring, and niez-i connected with the-magneto shaft for mering said end of the spring away from said stop, whereby release of the :spring eauses rotation of the .inagneto shaft, said springacting to absorb the-shock of the aeturningmarts by engaging said stop.

13. In a magneto, an oscillator "having a coiled torsional spring with proffitingeiids. a stationary stop each end oft-he sprin i flfieensconnecbed ithiheinaggie shat t i'or T'eithe'rof ithe -',s.p :i13gaway its ass-centred stop, retea'se or the spring causes screamed; atitr'n ot .zhe magneto shatt, the end 4p=tlie spring-acting to absorb the shoe of the re- 'llu turning parts by engaging the associated stop.

14. In a magneto oscillator, a torsional spring consisting of coils arranged to form a eylindriiral body portion and terminating at one end in a projection, means for operatively connecting said spring to a magneto shaft, a stop for said projecting end of the spril'ig, and means for moving said end of the spring away from said stop, whereby 10 release of the spring causes accelerated r0- tation of the magneto shaft.

In testimony whereof, I have hereunto set my hand this 10th day of January, 1921.

JOHN LEWIS MILTON. 

